某发电厂#1、#2发电机保护误动原因分析  

Analysis of #1 and #2 generator protection maloperation in a power plant

作　　者：张棋[1] 陈艳 周钢农[1] 盖欣[1] 

机构地区：[1]国电南京自动化股份有限公司,江苏南京210003 [2]宁夏沙坡头水利枢纽有限责任公司,宁夏中卫751700

出　　处：《电力系统保护与控制》2010年第15期143-146,共4页Power System Protection and Control

摘　　要：以某发电厂两台135MW机组在正常运行中突然相继跳闸为例,论述了保护动作的原因,并根据保护装置动作的动作行为和录波数据,分析了整个事件的过程。指出部分错误的接线、定值的偏低和保护判据的不完善是导致此次保护装置误动的主要原因。根据现场实际情况,通过整改接线及重新设置保护逻辑等措施进行了改进,增强了保护装置的可靠性,提高了机组的安全稳定性。Taking the sudden trip of two 135 MW sets in a power plant as an example,this paper discusses the factors that trigger the relays＇ trip and analyzes the whole event based on relay operation behaviour and recorded data.Wrong connection,lower setting values and imperfect trip judgement are the main reasons causing the maloperation of the relay.According to the practical situation on site,connection and protection logic are impoved,so that the reliability of relay is strengthened and the generators＇ stability and safety are enhanced.

关 键 词：匝间保护 接地保护 数据分析 整改措施 

分 类 号：TM621.3[电气工程—电力系统及自动化]